The Federation of South Arabia was an organisation of states under British protection in what would become South Yemen.
It was formed on 4 April 1962 from the 15 protected states of the Federation of Arab Emirates.
On 18 January 1963 it was merged with the Crown colony of Aden. In June 1964, the Upper Aulaqi Sultanate was added for a total of 17 states.
The Federation was abolished on 30 November 1967, when its status as a British protectorate came to an end, along with that of the Protectorate of South Arabia, and they became the People's Republic of Southern Southern Yemen